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Comparison of soil and foliar zinc application for enhancing grain zinc content of wheat when grown on potentially zinc‐deficient calcareous soils
Author(s) -
Zhao Aiqing,
Tian Xiaohong,
Cao Yuxian,
Lu Xinchun,
Liu Ting
Publication year - 2014
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.6518
Subject(s) - calcareous , zinc , bioavailability , phytic acid , agronomy , calcareous soils , soil water , chemistry , biofortification , cultivar , wheat grain , soil ph , biology , botany , environmental science , soil science , food science , bioinformatics , organic chemistry
BACKGROUND The concentration of Zn and phytic acid in wheat grain has important implications for human health. We conducted field and greenhouse experiments to compare the efficacy of soil and foliar Zn fertilisation in improving grain Zn concentration and bioavailability in wheat ( Triticum aestivum L.) grain grown on potentially Zn‐deficient calcareous soil . RESULTS Results from the 2‐year field experiment indicated that soil Zn application increased soil DTPA ‐Zn by an average of 174%, but had no significant effect on grain Zn concentration. In contrast, foliar Zn application increased grain Zn concentration by an average of 61%, and Zn bioavailability by an average of 36%. Soil DTPA ‐Zn concentrations varied depending on wheat cultivars. There were also significant differences in grain phytic acid concentration among the cultivars. A laboratory experiment indicated that Zn (from ZnSO 4 ) had a low diffusion coefficient in this calcareous soil . CONCLUSION Compared to soil Zn application, foliar Zn application is more effective in improving grain Zn content of wheat grown in potentially Zn‐deficient calcareous soils. © 2013 Society of Chemical Industry